You know there are just some things a cook shouldn't be without in their kitchen. This is one of them! Heavy duty, half sheet, baking pans. I have 4 of them and they get used almost every day. And since I am the Summer camp cook for our church and I also cater, these accompany me whenever I cook outside my home. I purchased mine at GFS. They have the rolled edge and are an inch deep. I use mine for:
Texas sheet cake
large batches of brownies
any kind of dessert bars
various baked chicken dishes
to pre-bake ribs for grilling
to toast nuts or coconut in the oven
I also use them to keep pancakes and French toast warm in the oven, when I'm cooking for a crowd. I'm sure I've used it for FAR more. But the point is, this is one of my personal "Kitchen must haves."